Kris Boyd tears into Ibrox mystery man Carlos Pena

The Â£3m summer signing from Mexico has played only 25 minutes of football at Ibrox as Pedro Caixinha prepares to unleash the second most expensive signing of the transfer window into Scottish football.

Pena played for Mexico last season and is believed to be on a contract similar to Joey Barton in order to prevent European vultures swooping for the talented playmaker.

Boyd has watched Kilmarnock lose their last four matches to sit bottom of the table without a point and out of the League Cup but finds his thoughts wondering to the problems at Ibrox.

â€œBy all accounts heâ€™s on big wages at Ibrox,â€� the SPL record goalscorer states in The Sun. â€œHaving signed a three-year contract that basically has him in with the bricks.

â€œIâ€™m sorry, but the Rangers fans have a right to ask what on earth is going on there. Theyâ€™ve got a right to know why Pena has hardly kicked a ball.

â€œAt 27, he should be at the peak of his career and playing every week. But heâ€™s literally nowhere to be seen.

â€œI just cannot get my head around it and find it utterly staggering that heâ€™s virtually gone missing.

â€œDid I miss something with Rangers? Have they suddenly got fortunes to waste on players who arenâ€™t playing?

â€œListen, I know I have never been the fittest player in the world but Iâ€™ve always been able to play games. Iâ€™ve always been available for selection.

â€œPena has only made one appearance for Rangers since joining the club and that was as a substitute for 25 minutes against Hibs. The rest of the time heâ€™s nowhere to be seen. What is going on?

â€œAlarm bells must be ringing out loud behind the scenes at the club. If not, they should be.

Is he giving Rangers everything heâ€™s got? Is he doing all he can to get into the team and help out?

â€œThatâ€™s what I want to know because there was a suggestion he was late for Rangersâ€™ game against Dunfermline, which didnâ€™t go down well with his manager who is committed to giving his top signing the best opportunity.â€�

Boyd added: â€œItâ€™s just a bizarre situation for a player Rangers brought to the club as one of their big summer signings.

â€œHe is their equivalent of Scott Sinclair at Celtic. The Englishman came to Celtic Park on similar money and has ripped it up.

â€œHeâ€™s proved to be superb value â€” the complete opposite, so far, of Pena.â€�

Kilmarnock face Hamilton at Rugby Park today looking for their first point of the season despite playing all of their matches at home.

Lee McCulloch is finding life in the firing line more challenging that last season when he took over on a caretaker basis after Lee Clark quit for Bury.

Like Neil McCann the realities of front line football management are proving brutal and unforgiving.